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首页> 外文期刊>Polymers for advanced technologies >Studies on the properties of EPDM-CSE blend containing HTPB for case-bonded solid rocket motor insulation
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Studies on the properties of EPDM-CSE blend containing HTPB for case-bonded solid rocket motor insulation

机译：含HTPB的EPDM-CSE共混物用于粘结固体火箭发动机绝缘的性能研究

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Elastomeric blends based on ethylene propylene diene (EPDM) rubber as a primary polymer have been investigated for the thermal insulation of case-bonded solid rocket motors (SRMs) cast with composite propellant containing hydroxy terminated polybutadiene (HTPB) as a polymeric binder. EPDM rubber found as an attractive candidate for the thermal insulation of case-bonded SRM due to the advantages such as low specific gravity, improved ageing properties, and longer shelf life. In spite of these advantages, EPDM, a non-polar rubber, lacks sufficient bonding with the propellant matrix. Bonding properties are found to improve when EPDM is blended with other polar rubbers like polychloroprene, chlorosulphonated polyethylene (CSE), etc. This type of polar polymer when blended with EPDM rubber enhances the insulator-to-propellant interface bonding. In the present work, an attempt has been made to study the properties of EPDM-CSE based insulator by incorporating HTPB, a polar polymer as well as a polymeric binder, as an additive to the EPDM-CSE blend by varying the HTPB concentration. Blends prepared were cured and characterized for rheological, mechanical, interface, and thermal properties to study the effect of HTPB addition. This paper reports the preliminary investigation of the properties of EPDM-CSE blend containing HTPB, as a novel and futuristic elastomeric insulation for case-bonded SRM containing HTPB as propellant binder.
机译：已经研究了以乙丙二烯（EPDM）橡胶为主要聚合物的弹性体共混物，用于铸造壳体粘合的固体火箭发动机（SRM）的热绝缘，该壳体用含羟基封端的聚丁二烯（HTPB）作为聚合物粘合剂的复合推进剂浇铸而成。由于其比重低，改进的老化性能和更长的保存期限等优点，EPDM橡胶被认为是用于粘合箱式SRM隔热材料的有吸引力的候选材料。尽管具有这些优点，但EPDM（一种非极性橡胶）与推进剂基质之间缺乏足够的粘合力。当将EPDM与其他极性橡胶（如聚氯丁二烯，氯磺化聚乙烯（CSE）等）共混时，发现粘合性能得到改善。与EPDM橡胶共混时，这种极性聚合物可增强绝缘体与推进剂的界面粘合力。在当前工作中，已经尝试通过掺入HTPB，一种极性聚合物以及一种聚合物粘合剂作为添加剂，通过改变HTPB的浓度，将其作为EPDM-CSE共混物的添加剂，从而研究基于EPDM-CSE的绝缘子的性能。固化所制备的共混物，并对其流变，机械，界面和热性能进行表征，以研究HTPB添加的影响。本文报道了含HTPB的EPDM-CSE共混物的性能的初步研究，作为含HTPB作为推进剂粘合剂的壳式SRM的新型且未来的弹性体绝缘材料。

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